On the buy side, it's for avoiding using a bank account and the associated know-your-customer and anti-money-laundering laws. If you send and receive dollars, t

On the buy side, it's for avoiding using a bank account and the associated know-your-customer and anti-money-laundering laws. If you send and receive dollars, there are reporting requirements that you have to legally follow. Tethers are car wash tokens, not dollars, so various organizations are willing to let you do whatever with them. The obvious incentive on the sell side is that you can print literally billions of car wash tokens and buy other cryptocurrencies with them.